So I bought my first strobist setup and did so regrettably from ebay. I bought a sunpak 114d flash and a weston w18 flash. I bought a greenlife pt04 wireless receiver which came with a rf04 transmitter. I replaced the batteries in each in hopes that they would solve the problem. When I put the transmitter on my hotshoe and connect the flash to the receiver, I get nothing from the test from the transmitter or when I fire my camera. Is there anyway to fix this or is this cheap wireless setup a total piece. O and I'm shooting with a 20d if that makes any difference.